no
mining is Nevada's major resource
Copper
water
Diamond
Arizona is a major producer of copper.
In some geographies, yes, diamond is a major resource.
The Earth's major energy resource is the energy coming form the Sun.
coal
Nitrates for fertilizer used to be the major resource mined in the desert. Today copper is mined and the major resource of the area.
no
The oil sands are a major resource which also contribute to air pollution.